Submission #51462

#	Time	Username	Problem	Language	Result	Execution time	Memory
51462		DrumpfTheGodEmperor	Foehn Phenomena (JOI17_foehn_phenomena)	C++14	100 / 100	234 ms	7656 KiB

foehn_phenomena

#include <bits/stdc++.h>
#define int long long
#define MOD 1000000007
#define pb push_back
#define bw(i,r,l) for (int i=r-1;i>=l;i--)
#define fw(i,l,r) for (int i=l;i<r;i++)
using namespace std;
const int N=200005;
int ans=0,n,q,S,T,a[N],cur[N];
int get(int x) {
	if (x>0) return x*T;
	else return S*x;
}
signed main() {
	//freopen("aome.inp","r",stdin);
	ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
	cin>>n>>q>>S>>T;
	fw (i,0,n+1) cin>>a[i];
	fw (i,0,n) {
		cur[i]=a[i]-a[i+1];
		ans+=get(cur[i]);
	}
	fw (i,0,q) {
		int l,r,x;
		cin>>l>>r>>x;
		ans-=get(cur[l-1]); if (r<n) ans-=get(cur[r]);
		cur[l-1]-=x; if (r<n) cur[r]+=x;
		ans+=get(cur[l-1]); if (r<n) ans+=get(cur[r]);
		cout<<ans<<"\n";
	}
	return 0;
}

• Subtask 1: 30 / 30
• Subtask 2: 10 / 10
• Subtask 3: 60 / 60